ErrnoException


public final class ErrnoException
extends Exception

java.lang.Object
   ↳ java.lang.Throwable
     ↳ java.lang.Exception
       ↳ android.system.ErrnoException


A checked exception thrown when Os methods fail. This exception contains the native errno value, for comparison against the constants in OsConstants, should sophisticated callers need to adjust their behavior based on the exact failure.

Summary

Fields

public final int errno

The errno value, for comparison with the E constants in OsConstants.

Public constructors

ErrnoException(String functionName, int errno)

Constructs an instance with the given function name and errno value.

ErrnoException(String functionName, int errno, Throwable cause)

Constructs an instance with the given function name, errno value, and cause.

Public methods

String getMessage()

Converts the stashed function name and errno value to a human-readable string.

IOException rethrowAsIOException()

Throws an IOException with a message based on getMessage() and with this instance as the cause.

SocketException rethrowAsSocketException()

Throws a SocketException with a message based on getMessage() and with this instance as the cause.

Inherited methods

final void addSuppressed(Throwable exception)

Appends the specified exception to the exceptions that were suppressed in order to deliver this exception.

Throwable fillInStackTrace()

Fills in the execution stack trace.

Throwable getCause()

Returns the cause of this throwable or null if the cause is nonexistent or unknown.

String getLocalizedMessage()

Creates a localized description of this throwable.

String getMessage()

Returns the detail message string of this throwable.

StackTraceElement[] getStackTrace()

Provides programmatic access to the stack trace information printed by printStackTrace().

final Throwable[] getSuppressed()

Returns an array containing all of the exceptions that were suppressed, typically by the try-with-resources statement, in order to deliver this exception.

Throwable initCause(Throwable cause)

Initializes the cause of this throwable to the specified value.

void printStackTrace()

Prints this throwable and its backtrace to the standard error stream.

void printStackTrace(PrintWriter s)

Prints this throwable and its backtrace to the specified print writer.

void printStackTrace(PrintStream s)

Prints this throwable and its backtrace to the specified print stream.

void setStackTrace(StackTraceElement[] stackTrace)

Sets the stack trace elements that will be returned by getStackTrace() and printed by printStackTrace() and related methods.

String toString()

Returns a short description of this throwable.

Object clone()

Creates and returns a copy of this object.

boolean equals(Object obj)

Indicates whether some other object is "equal to" this one.

void finalize()

Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.

final Class<?> getClass()

Returns the runtime class of this Object.

int hashCode()

Returns a hash code value for the object.

final void notify()

Wakes up a single thread that is waiting on this object's monitor.

final void notifyAll()

Wakes up all threads that are waiting on this object's monitor.

String toString()

Returns a string representation of the object.

final void wait(long timeoutMillis, int nanos)

Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

final void wait(long timeoutMillis)

Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

final void wait()

Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

Fields

errno

Added in API level 21
public final int errno

The errno value, for comparison with the E constants in OsConstants.

Public constructors

ErrnoException

Added in API level 21
public ErrnoException (String functionName, 
                int errno)

Constructs an instance with the given function name and errno value.

Parameters
functionName String

errno int

ErrnoException

Added in API level 21
public ErrnoException (String functionName, 
                int errno, 
                Throwable cause)

Constructs an instance with the given function name, errno value, and cause.

Parameters
functionName String

errno int

cause Throwable

Public methods

getMessage

Added in API level 21
public String getMessage ()

Converts the stashed function name and errno value to a human-readable string. We do this here rather than in the constructor so that callers only pay for this if they need it.

Returns
String the detail message string of this Throwable instance (which may be null).

rethrowAsIOException

Added in API level 30
public IOException rethrowAsIOException ()

Throws an IOException with a message based on getMessage() and with this instance as the cause.

This method always terminates by throwing the exception. Callers can write throw e.rethrowAsIOException() to make that clear to the compiler.

Returns
IOException This value cannot be null.

Throws
IOException

rethrowAsSocketException

Added in API level 30
public SocketException rethrowAsSocketException ()

Throws a SocketException with a message based on getMessage() and with this instance as the cause.

This method always terminates by throwing the exception. Callers can write throw e.rethrowAsIOException() to make that clear to the compiler.

Returns
SocketException This value cannot be null.